$ ll
total 4
-rw-r--r-- 1 linuxer users 21 Nov  4 13:42 a.xml
$ cat a.xml
hallo
du<ENCC>
welt.
$ perl -p -i.orig -e 's/.*<ENCC>.*//' *.xml *.XML
Can't open *.XML: No such file or directory, <> line 3.
$ ll
total 8
-rw-r--r-- 1 linuxer users 13 Nov  4 13:43 a.xml
-rw-r--r-- 1 linuxer users 21 Nov  4 13:42 a.xml.orig
$ cat a.xml
hallo

welt.
$  cat a.xml.orig
hallo
du<ENCC>
welt.
$